jmeClone

Performs a regular shallow clone of the object. Some fields
may also be cloned but generally only if they will never be
shared with other objects. (For example, local Vector3fs and so on.)

This method is separate from the regular clone() method
so that objects might still maintain their own regular java clone()
semantics (perhaps even using Cloner for those methods). However,
because Java's clone() has specific features in the sense of Object's
clone() implementation, it's usually best to have some path for
subclasses to bypass the public clone() method that might be cloning
fields and instead get at the superclass protected clone() methods.
For example, through super.jmeClone() or another protected clone
method that some base class eventually calls super.clone() in.